Proxy for apt-get in Ubuntu Server 14.04

1. Download and Install NTLMAPS manually from https://packages.debian.org/sid/all/ntlmaps/download 
2. Then, follows the steps

Configure it: domain, username, password, proxyserver.net, port

1. Files: /etc/bash.bashrc

   export http_proxy=http://127.0.0.1:5865
   export https_proxy=http://127.0.0.1:5865
   export ftp_proxy=http://127.0.0.1:5865
   

   /etc/environment

   http_proxy=http://127.0.0.1:5865
   https_proxy=http://127.0.0.1:5865
   ftp_proxy=http://127.0.0.1:5865
   

   /etc/apt/apt.conf (create the file if it does not exist)

   Acquire::http::Proxy "http://127.0.0.1:5865";
   Acquire::https::Proxy "http://127.0.0.1:5865";
   Acquire::ftp::Proxy "http://127.0.0.1:5865";